RHSA-2026:26528

Vulnerability from csaf_redhat - Published: 2026-06-25 08:39 - Updated: 2026-09-01 12:03
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.12.92 bug fix and security update
Severity
Critical
Notes
Topic: Red Hat OpenShift Container Platform release 4.12.92 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.12. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.12.92. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHSA-2026:26527 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes Security Fix(es): None For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-35385

A flaw was found in OpenSSH. When the `scp` command is used by a root user to download a file with the legacy protocol option (`-O`) and without preserving original file permissions (`-p`), the downloaded file can be installed with elevated privileges (setuid or setgid). This unexpected behavior could allow a malicious file to execute with higher permissions than intended, posing a security risk through potential privilege escalation.

7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-281 - Improper Preservation of Permissions
Affected products
Product Identifier Version Remediation
Unresolved product id: 8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-39979

A flaw was found in jq, a command line JSON processor, specifically in the libjq API. Parsing a malformed JSON input from a non-NUL-terminated buffer using the `jv_parse_sized` function can cause an out-of-bounds read, resulting in an application crash and a possible memory disclosure within the error message generated by the parser.

8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 1 product, the same list as for CVE-2026-35385
Threats
Impact Important
CVE-2026-40164

A flaw was found in jq, a command-line JSON processor. A remote attacker could exploit this vulnerability by providing a specially crafted JSON object. This object leverages a weakness in jq's hashing algorithm, which uses a hardcoded, publicly known seed. By crafting the JSON object to cause hash collisions, an attacker can degrade the performance of JSON object hash table operations, leading to significant CPU exhaustion and a denial of service (DoS) for systems processing the malicious JSON data.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-341 - Predictable from Observable State
Affected products
Fixed 1 product, the same list as for CVE-2026-35385
Threats
Impact Important
CVE-2026-43037

A flaw was found in the Linux kernel's IPv6 tunnel implementation. A remote attacker could exploit this flaw by sending malicious ICMPv6 error messages to cause a stack-based buffer overflow in the kernel's IPv4-over-IPv6 tunnel error handling code. This could result in a kernel crash (denial of service) or potentially allow arbitrary code execution with kernel privileges.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Affected products
Fixed 1 product, the same list as for CVE-2026-35385
Threats
Impact Critical
References
URL Category
https://access.redhat.com/errata/RHSA-2026:26528 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2454469 external
https://bugzilla.redhat.com/show_bug.cgi?id=2458077 external
https://bugzilla.redhat.com/show_bug.cgi?id=2458084 external
https://bugzilla.redhat.com/show_bug.cgi?id=2464351 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-35385 self
https://bugzilla.redhat.com/show_bug.cgi?id=2454469 external
https://www.cve.org/CVERecord?id=CVE-2026-35385 external
https://nvd.nist.gov/vuln/detail/CVE-2026-35385 external
https://marc.info/?l=openssh-unix-dev&m=177513443… external
https://www.openssh.org/releasenotes.html#10.3p1 external
https://www.openwall.com/lists/oss-security/2026/… external
https://access.redhat.com/security/cve/CVE-2026-39979 self
https://bugzilla.redhat.com/show_bug.cgi?id=2458077 external
https://www.cve.org/CVERecord?id=CVE-2026-39979 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39979 external
https://github.com/jqlang/jq/commit/2f09060afab23… external
https://github.com/jqlang/jq/security/advisories/… external
https://access.redhat.com/security/cve/CVE-2026-40164 self
https://bugzilla.redhat.com/show_bug.cgi?id=2458084 external
https://www.cve.org/CVERecord?id=CVE-2026-40164 external
https://nvd.nist.gov/vuln/detail/CVE-2026-40164 external
https://github.com/jqlang/jq/commit/0c7d133c3c7e3… external
https://github.com/jqlang/jq/security/advisories/… external
https://access.redhat.com/security/cve/CVE-2026-43037 self
https://bugzilla.redhat.com/show_bug.cgi?id=2464351 external
https://www.cve.org/CVERecord?id=CVE-2026-43037 external
https://nvd.nist.gov/vuln/detail/CVE-2026-43037 external
https://lore.kernel.org/linux-cve-announce/202605… external
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          "details": "To mitigate this issue, manually ensure that every buffer is NUL-terminated before passing it to the \u0027jv_parse_sized\u0027 function.",
          "product_ids": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers"
    },
    {
      "cve": "CVE-2026-40164",
      "cwe": {
        "id": "CWE-341",
        "name": "Predictable from Observable State"
      },
      "discovery_date": "2026-04-14T00:01:04.003115+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2458084"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in jq, a command-line JSON processor. A remote attacker could exploit this vulnerability by providing a specially crafted JSON object. This object leverages a weakness in jq\u0027s hashing algorithm, which uses a hardcoded, publicly known seed. By crafting the JSON object to cause hash collisions, an attacker can degrade the performance of JSON object hash table operations, leading to significant CPU exhaustion and a denial of service (DoS) for systems processing the malicious JSON data.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "jq: jq: Denial of Service via crafted JSON object causing hash collisions",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-40164"
        },
        {
          "category": "external",
          "summary": "RHBZ#2458084",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458084"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-40164",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-40164"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-40164",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40164"
        },
        {
          "category": "external",
          "summary": "https://github.com/jqlang/jq/commit/0c7d133c3c7e37c00b6d46b658a02244fdd3c784",
          "url": "https://github.com/jqlang/jq/commit/0c7d133c3c7e37c00b6d46b658a02244fdd3c784"
        },
        {
          "category": "external",
          "summary": "https://github.com/jqlang/jq/security/advisories/GHSA-wwj8-gxm6-jc29",
          "url": "https://github.com/jqlang/jq/security/advisories/GHSA-wwj8-gxm6-jc29"
        }
      ],
      "release_date": "2026-04-13T23:40:12.693000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-25T08:39:40+00:00",
          "details": "For OpenShift Container Platform 4.12 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64 architecture. The image digest may be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\n      The sha value for the release is as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:4d3bbcec187be94449a001896fcd21e41580dbba1cac38717905a2cb31a94a6e\n\nAll OpenShift Container Platform 4.12 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.",
          "product_ids": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:26528"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "jq: jq: Denial of Service via crafted JSON object causing hash collisions"
    },
    {
      "cve": "CVE-2026-43037",
      "cwe": {
        "id": "CWE-843",
        "name": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)"
      },
      "discovery_date": "2026-05-01T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2464351"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s IPv6 tunnel implementation. A remote attacker could exploit this flaw by sending malicious ICMPv6 error messages to cause a stack-based buffer overflow in the kernel\u0027s IPv4-over-IPv6 tunnel error handling code. This could result in a kernel crash (denial of service) or potentially allow arbitrary code execution with kernel privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ip6_tunnel: clear skb2-\u003ecb[] in ip4ip6_err()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Critical flaw in the Linux kernel\u0027s IPv6 tunneling error handling can lead to a stack buffer overflow. An unauthenticated remote attacker could exploit this by sending specially crafted network packets, potentially resulting in a denial of service or information disclosure on affected Red Hat Enterprise Linux systems.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "RHBZ#2464351",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464351"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43037",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43037",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43037"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43037-0346@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43037-0346@gregkh/T"
        }
      ],
      "release_date": "2026-05-01T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-25T08:39:40+00:00",
          "details": "For OpenShift Container Platform 4.12 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64 architecture. The image digest may be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\n      The sha value for the release is as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:4d3bbcec187be94449a001896fcd21e41580dbba1cac38717905a2cb31a94a6e\n\nAll OpenShift Container Platform 4.12 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.",
          "product_ids": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:26528"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is to skip loading the affected module `ip6_tunnel` onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time.\n~~~\nHow do I blacklist a kernel module to prevent it from loading automatically? \nhttps://access.redhat.com/solutions/41278  \n~~~\n\nWe may also want to detection and monitoring an affected system as below:\n~~~\nMonitor for exploitation attempts:\n\n# Enable kernel audit for IPv6 tunnel operations\nauditctl -a always,exit -F arch=b64 -S socket -F a0=10 -F a1=3 -k ipv6_tunnel\n\n# Monitor system logs for kernel panics/crashes\njournalctl -k -p err -f | grep -i \"ip6_tunnel\\|icmp\\|stack\"\n~~~",
          "product_ids": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "8Base-RHOSE-4.12:rhcos-x86_64-412.86.202606140301-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ],
      "title": "kernel: ip6_tunnel: clear skb2-\u003ecb[] in ip4ip6_err()"
    }
  ]
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.